[R-SIG-Mac] Change in macOS Framework directory for arm64 4.6

[John Benninghoff]

Hello,

Previous versions of R (since R 4.3) have consistently named directories within /Library/Frameworks/R.framework/Versions (Major.Minor-platform):

On Intel:

drwxrwxr-x  7 root       admin  224 Apr 24 08:34 4.3-x86_64
drwxrwxr-x@ 7 root       admin  224 Apr 24 08:35 4.4-x86_64
drwxrwxr-x@ 7 root       admin  224 Apr 26 08:14 4.5-x86_64
drwxrwxr-x@ 7 root       admin  224 Apr 26 08:29 4.6-x86_64


On Apple Silicon:

drwxrwxr-x  7 root       admin  224 Mar 16  2024 4.1-arm64
drwxrwxr-x  7 root       admin  224 Mar 16  2024 4.2-arm64
drwxrwxr-x  7 root       admin  224 Apr 24  2024 4.3-arm64
drwxrwxr-x  7 root       admin  224 Oct  2  2025 4.4-arm64
drwxrwxr-x@ 7 root       admin  224 Apr 28 07:38 4.5-arm64
drwxrwxr-x  7 root       admin  224 Apr 28 07:38 4.6

However, with 4.6, the naming convention has changed, and only for arm-based platforms (making the names inconsistent). I wasn’t expecting this and it led to a minor scripting failure. I can work around this change on my end, but I’m curious to know: was this change intentional, and if so, why the change?

Thanks,
John Benninghoff
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